Not traditional dispensationalists nor the progressive dispensationalists. Only the ultra-dispensationalists believe in two gospels and a later gospel of Grace. The Gospel of Grace began with Christ's resurrection and His commands to preach the Gospel (Luke 24).
You are free to believe as you will. And you are free to believe what others judge to be marks of certain denominations. The Gospel of Grace did not begin with Christ’s resurrection and His commands to preach the Gospel. That was the gospel of the kingdom in Luke 24. Go back and read what that gospel was called: it was plainly called the gospel of the kingdom. Read what the Bible ACTUALLY SAYS, not what you THINK IT SAYS. There’s a difference, I assure you. The very fact that you think Luke 24 is the gospel of the grace of God tells me that. Perhaps you should look at His later command. To Paul. To preach the gospel of the grace of God. I’m sure your Bible has His words all highlighted in red for easy identification.