ebeye has answered the question, but I would add a point that if you're asking these types of questions, you are probably not ready for commercial construction. The commercial GC will probably spot this too and it's unlikely he will consider you.
Do some more research on scope preparation and scope management. Typically a GC will provide you with specs/drawings, possibly a qty only BOQ and a brief scope of works, eg. "You are tendering for the provision of painting services as per the attached drawings and specs, including, but not limited to the supply of all labour, materials and necessary plant". It's up to you to price properly, but
be careful. For example if you don't qualify that your bid is for labour during normal working hours only, the GC is legitimately in a position to require you to complete the works at night for no extra cost!!