If you have Existing Git repository:
cd existing_repogit remote rename origin old-origingit remote add origin https://gitlab.com/newprojectgit push -u origin --allgit push -u origin --tags
If you have Existing Git repository:
cd existing_repogit remote rename origin old-origingit remote add origin https://gitlab.com/newprojectgit push -u origin --allgit push -u origin --tags