Ubuntu – gnome-terminal multi-tab title position

Move to top

gsettings set org.gnome.Terminal.Legacy.Settings tab-position top 

Move to bottom

gsettings set org.gnome.Terminal.Legacy.Settings tab-position bottom

If you want to use a function stored in ~/.bashrc then source that file in your command:

gnome-terminal --tab -e "bash -c 'source ~/.bashrc;set-title 99;ping 192.168.7.99'"

You've mentioned in the comments that you plan to use this in a shell script and with multiple gnome-terminal tabs. As a proof of concept, you can use the following script as example:

#!/bin/bash
gnome-terminal --tab -e "bash -c 'printf \"\033]0;TEST1\007\"; sleep 7'" \
               --tab -e "bash -c 'printf \"\033]0;TEST2\007\"; ping -c 4 8.8.8.8'" \

Instead of bash function, this uses printf and escape sequences directly. Please be mindful of the backslashes.