It means "how are you?" or "what's up?" A funny way to express that everything is good by referencingwealthylifestyle with the expensive fashion brand in the expression.
derived from the original rapper "GucciMang". the term "whats gucci" can be used to replace : whats up, how are you, or what are you doing today. it is a very hood term and is mostly used by tall skinny black kids.