Knowing better hacks?
*** /usr/local/bin/gpg ***
#!/bin/sh
if [ -f "$HOME/.gpg-agent-info" ]; then
   . "$HOME/.gpg-agent-info"
fi
gpg2 "$@"
*** /home/x-alina/.profile ***
# [...]
if ! pidof gpg-agent; then
    gpg-agent --daemon --enable-ssh-support > "$HOME/.gpg-agent-info"
fi
if [ -f "$HOME/.gpg-agent-info" ]; then
    . "$HOME/.gpg-agent-info"
fi