"What are you doing?"
"I told you, I'm headed to gym."
I read the above in a novel today. "I'm headed to gym" seems wrong to me because [please insert reason here]. Am I right?
"What are you doing?"
"I told you, I'm headed to gym."
I read the above in a novel today. "I'm headed to gym" seems wrong to me because [please insert reason here]. Am I right?
The question is not so much whether it’s ‘correct grammar’, as whether anyone actually says it. There are a number of nouns describing places that can be used in objective position without an article. In the UK, at least, you will hear things like ‘I have to go to hospital’, ‘Is he going to school yet?’ ‘When is she going to university?’ ‘I went to church today’. A gym seems to be a different sort of place, a mere building rather than a respected institution, and it seems to be that that makes the difference, so you don’t normally hear ‘I’m going to gym’. However, you might occasionally hear ‘We had gym at school today’, meaning the speaker had a lesson in physical education, or ‘I’ve got gym now’, meaning the speaker is scheduled to take some form of indoor exercise.
"I am heading to a store/my school/the gymnasium" is correct. English requires an article or possessive for most object nouns.