Dear customer,
Here is the WIKI. seeedstudio.com/wiki/2.8’’_TFT_Touch_Shield
There already show you 4 pins is unused. D0,D1,A4,A5.
So analog pins is ok for you, change to A4,A5 then you can do your project.
But yes you need a jumper wire connect and code to Uno by yourself.
Best regards,
Yuri