You can still use it to indicate movement toward a place. It is used to indicate the future when used with another verb, if it's used by itself it will indicate movement (most of the time, see below).
"I'm going to Spain" > "I'm moving towards Spain"
"I'm going to go to Spain" > "I will go to Spain"
"I'm going to the Mall" > "I'm moving towards the Mall"
"I'm going to go shopping" > "I will go to do the action of shopping"
going to used by itself can indicate future depending on context:
"Are you going to do your homework?"
"Yeah, I'm going to..."
The verb has been omitted in this case, and can be inferred from context.