Simple answer is no, he is isn't travelling the exact same path as Luffy.
We do know that Gol D. Roger travelled the world for ~14 years after he reached the 2nd to last island, Lodestar (end of the Grand Line). We also know that he was ~39 years old when he reached Lodestar Island.
That means he most probably been to every single island in the world over his ~35 years as a pirate, assuming he became one at approximately the same age as Luffy.
--ANIME SPOILERS AHEAD: INCLUDES Chapter 967 FROM MANGA--
@Ashish Kumar: Your timeline is slightly wrong.
We don't know how long it took Gol D. Roger to get to Lodestar island. The year he did reach it (39 years ago), is the year Shanks was born.
After that it took him 13 years to finally find someone from Wano, Oden (26 years ago). So for 13 years he was just searching for someone who can:
- read the Road Poneglyphs
- knows where the last poneglyph was (Zou)
After Oden joined Roger Pirates it took them less than a year to travel to:
Skypeia > Water 7 > Tequila Wolf > Sabaody Archipelago > Fish-man Island > Wano > Zou > Some Harbour > Laugh Tale (Chapter 967).
Before reaching Laugh Tale, Roger did not know about:
- Void Century
- Meaning of the name D
- Use for ancient weapons. But Roger wouldn't be able to use them as he was dying and Poseidon (the mermaid princess) wouldn't be born for another 10 years.
After reaching Laugh Tale, Roger disbands his pirate crew and spends the last year of his life with Portgas D. Rouge.
So Luffy is not travelling the same exact path as Roger. But Roger had 13 year of exploring the new world and visited most islands, possibly even all the islands in the world.
Sailed again with Oden to provide a path to the man of prophecy (yours
luffy) So, that he wouldn't have to invest as much time and effort as
Roger couldn't possibly know about Luffy (or any other Joyboy) before Laugh Tale.