bépo on gdm FreeBSD 11

[AikiZen]

hi,
i have gdm on qwerty, not on my using keyboard bépo.
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my /usr/local/etc/X11/xorg.conf.d/10-keyboards.conf :

Section "InputClass"
  Identifier "Keyboards"
  Driver "evdev"
  Option "XKBOptions" "terminate:ctrl_alt_bksp" # and so on

  # If you save this file under xorg.conf.d/ :
  Option "AutoServerLayout" "on"

  MatchIsKeyboard "on"
  MatchProduct "TrulyErgonomic.com Truly Ergonomic Computer Keyboard"

  ### at-home-modifier options begin here.
  # The basic option.
  Option "XkbLayout" "fr"
  Option "XkbVariant" "bepo"
  Option "XKbOptions" "lv3:ralt_switch_multikey,numpad:pc"
  Option "TransMod" "36:64" # Defines key/modifier pairs. Use xev. e.g.
  Enter (real key):Alt (virtual key). EndSection

my rc.conf :

clear_tmp_enable="YES"
syslogd_flags="-ss"
sendmail_enable="NONE"
hostname="Dell-Precision"
keymaps="fr.bepo.kbd"
moused_enable="YES"
powerd_enable="NO"
# Set dumpdev to "AUTO" to enable crash dumps, "NO" to disable
dumpdev="AUTO"
zfs_enable="YES"
firewall_enable="yes"
firewall_type="workstation"
firewall_logdeny="yes"

wlans_ath0="wlan0"
create_args_wlan0="country FR regdomain ETSI"
ifconfig_wlan0="WPA SYNCDHCP"
ntpd_enable="yes"
ntpd_sync_on_start="yes"
ipv6_privacy="YES"
background_dhclient="YES"
devfs_system_ruleset="localrules"

allscreens_flags="-f vgarom-thin-8x16"
powerdxx_enable="YES"
microcode_update_enable="YES"

devfs_system_ruleset="localrules"

gdm_enable="YES"
gnome_enable="YES"
dbus_enable="YES"
hald_enable="YES"

jackd_enable="YES"
jackd_user="AikiZen"
jackd_rtprio="YES"
jackd_args="-R -doss -r{sample-rate} -p1024 -n3 -w16 \
            --capture /dev/dsp{N} --playback /dev/dsp{N}"cat

~ % cat /var/log/Xorg.0.log | grep WW
	(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[    39.745] (WW) Unresolved symbol: fbGetGCPrivateKey
[    39.770] (WW) VGA arbiter: cannot open kernel arbiter, no
multi-card support

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i search on duckduckgo but no find,
please help me,
best regard,
Aiki Zen.