First. is it a classic collectible or just a regular grill?
Second, whats a Cyberque?
Third, it can be done.. here are some tips.
1. Never use a center punch, the porcelain will chip out.
Use painters tape or maksing tape on the area to be drilled. This minimizes any potential problem with the drill bit doing major damage.
Start witha small sharp (new) drill bit. Then use a step bit or unitibt to get to the right size hole.Finally, take your time!
Piece of cake, right?
Search for mounting a thermometer, someone did a right up on how to drill into a lid.
Good Luck with the project!
AJ