Here is a Debian bug report (#404596):

From: "Antonis Antoniadis" <cereal.killer.rules@gmail.com>
To: submit@bugs.debian.org
Subject: wish-list bug: gvorak layout
Date: Tue, 26 Dec 2006 21:21:39 +0200

[Message part 1 (text/plain, inline)]

Package: xkb-data
Version: 0.9-4

Hello, I type dvorak, and i am also greek! When I wanted to type something
in greek, i had to load the "el" layout, which is qwerty based. This got me
very confused, and I was not able to touch type in greek. I searched the net
for a greek dvorak layout but couldn't find one. Then I made one on my own,
using the xmodmap programm. It really solved the problem, now i can write
greek, as fast and easy as english. I would like to share the layout i
created with other greek dvorak users, and i also would like to see it in
debian, i think that it is usefull for some people. I have attached the
layout file that i created with xmodmap attached to this message (it is
called gvorak as the layout). I hope, that i reported it to the correct
package. If there is a problem inserting that layout in debian, or whatever,
please let me know.
Thanks a lot,
Antonis Antoniadis <plutonas>

There is the layout

keycode   9 = Escape
keycode  10 = 1 exclam
keycode  11 = 2 at
keycode  12 = 3 numbersign
keycode  13 = 4 dollar
keycode  14 = 5 percent
keycode  15 = 6 asciicircum
keycode  16 = 7 ampersand
keycode  17 = 8 asterisk
keycode  18 = 9 parenleft
keycode  19 = 0 parenright
keycode  20 = bracketleft braceleft
keycode  21 = bracketright braceright
keycode  22 = BackSpace Terminate_Server
keycode  23 = Tab ISO_Left_Tab
keycode  24 = apostrophe quotedbl
keycode  25 = comma less
keycode  26 = period greater
keycode  27 = Greek_pi Greek_PI
keycode  28 = Greek_theta Greek_THETA
keycode  29 = Greek_phi Greek_PHI
keycode  30 = Greek_gamma Greek_GAMMA
keycode  31 = Greek_finalsmallsigma Greek_SIGMA
keycode  32 = Greek_rho Greek_RHO
keycode  33 = Greek_lamda Greek_LAMDA
keycode  34 = slash question
keycode  35 = equal plus
keycode  36 = Return
keycode  37 = Control_L
keycode  38 = Greek_alpha Greek_ALPHA
keycode  39 = Greek_omicron Greek_OMICRON
keycode  40 = Greek_epsilon Greek_EPSILON
keycode  41 = Greek_upsilon Greek_UPSILON
keycode  42 = Greek_iota Greek_IOTA
keycode  43 = Greek_delta Greek_DELTA
keycode  44 = Greek_eta Greek_ETA
keycode  45 = Greek_tau Greek_TAU
keycode  46 = Greek_nu Greek_NU
keycode  47 = Greek_sigma Greek_SIGMA
keycode  48 = minus underscore
keycode  49 = grave asciitilde
keycode  50 = Shift_L
keycode  51 = backslash bar
keycode  52 = semicolon colon
keycode  53 = Greek_xi Greek_XI
keycode  54 = Greek_psi Greek_PSI
keycode  55 = Greek_kappa Greek_KAPPA
keycode  56 = Greek_chi Greek_CHI
keycode  57 = Greek_beta Greek_BETA
keycode  58 = Greek_mu Greek_MU
keycode  59 = dead_acute dead_diaeresis
keycode  60 = Greek_omega Greek_OMEGA
keycode  61 = Greek_zeta Greek_ZETA
keycode  62 = Shift_R
keycode  63 = KP_Multiply XF86_ClearGrab
keycode  64 = Alt_L Meta_L
keycode  65 = space
keycode  66 = Control_L
keycode  67 = F1 XF86_Switch_VT_1
keycode  68 = F2 XF86_Switch_VT_2
keycode  69 = F3 XF86_Switch_VT_3
keycode  70 = F4 XF86_Switch_VT_4
keycode  71 = F5 XF86_Switch_VT_5
keycode  72 = F6 XF86_Switch_VT_6
keycode  73 = F7 XF86_Switch_VT_7
keycode  74 = F8 XF86_Switch_VT_8
keycode  75 = F9 XF86_Switch_VT_9
keycode  76 = F10 XF86_Switch_VT_10
keycode  77 = Num_Lock Pointer_EnableKeys
keycode  78 = Scroll_Lock
keycode  79 = KP_Home KP_7
keycode  80 = KP_Up KP_8
keycode  81 = KP_Prior KP_9
keycode  82 = KP_Subtract XF86_Prev_VMode
keycode  83 = KP_Left KP_4
keycode  84 = KP_Begin KP_5
keycode  85 = KP_Right KP_6
keycode  86 = KP_Add XF86_Next_VMode
keycode  87 = KP_End KP_1
keycode  88 = KP_Down KP_2
keycode  89 = KP_Next KP_3
keycode  90 = KP_Insert KP_0
keycode  91 = KP_Delete KP_Decimal
keycode  92 = Print Sys_Req
keycode  93 = Mode_switch
keycode  95 = F11 XF86_Switch_VT_11
keycode  96 = F12 XF86_Switch_VT_12
keycode  97 = Home
keycode  98 = Up
keycode  99 = Prior
keycode 100 = Left
keycode 102 = Right
keycode 103 = End
keycode 104 = Down
keycode 105 = Next
keycode 106 = Insert
keycode 107 = Delete
keycode 108 = KP_Enter
keycode 109 = Control_R
keycode 110 = Pause Break
keycode 111 = Print Sys_Req
keycode 112 = KP_Divide XF86_Ungrab
keycode 113 = ISO_Level3_Shift
keycode 114 = Pause Break
keycode 115 = Super_L
keycode 116 = Super_R
keycode 117 = Menu
keycode 124 = ISO_Level3_Shift
keycode 125 = NoSymbol Alt_L
keycode 126 = KP_Equal
keycode 127 = NoSymbol Super_L
keycode 128 = NoSymbol Hyper_L
keycode 156 = NoSymbol Meta_L