i created a gui and put a text.
I give that text a name = healthVal

when im pressing V i wanna make it +=1000
how can i use healthVal like a variable?
i tried

playerstatus.healthVal but its wrong usage idk how to change it sorry im new

you should operate on int/flt player.health variables, and then always set the gui text from that value.
gui_text.set(player.health);

i know thats but whats this "gui_text"
i can't reach that.

i tried to reach healthVal.set but healthVal is not defined.
how can i reach that?

You have to get your gui that inherit guiobjs then get your txt guiobj
Normaly when i create a ui i keep a * to this txt gui obj to be able to change it without going back and getting it again
Theres example how to write this in the tutorial on gui