Staphylococcus is
Gram positive bacteria 

There are 6 classic gram-positive bacteria that cause human disease.


Of these 2 are cocci


Staphylococci
Streptococci (including anaerobic peptostreptococci)


Other 4 are bacilli


Corynebacterium
Bacillus
Clostridium
Listeria
Gram - positive cocci
Gram - negative cocci
Gram - positive bacillus
Gram - negative bacillus