GTIM is an acronym that stands for "Good Times In Mind." It is an expression used when you are excited about something or looking forward to a good time. Some synonyms that can be used in place of GTIM include "excited," "thrilled," "looking forward to," "anticipating," "eager," "optimistic," "hopeful," "joyful," "upbeat," "positive," "enthusiastic," and "happy-go-lucky." These words convey the same feelings as GTIM and can be used interchangeably depending on the context and the situation. Next time you are feeling excited about something, try using one of these synonyms instead of the standard GTIM expression.