23-year-old Pepê is considered the successor to Napoli and PSG-linked Everton Soares at Gremio.
However, the Série A club could lose both of the forwards in the upcoming transfer window.
Wolfsburg and Porto ‘made recent consultations with Pepê’, although neither have submitted an official offer yet.
Gremio expect bids to arrive for the Brazil under-23 international in the coming weeks.
Wolfsburg’s interest was first revealed on Rádio Bandeirantes, with UOL now confirming it from their own sources.
The Germans have made contact more than once, requesting information about Pepê.
Porto, who have a long history of signing Brazilians, have also put the number 25 on their radar for the next transfer window.
Eredivisie side PSV Eindhoven had been in regular contact prior to the COVID-19 pandemic, but talks were suspended.
Pepê made 33 league appearances for Gremio last season, scoring eight and assisting three goals.
In his six caps for Brazil’s under-23 goal, Pepê has been very prolific with three goals in six appearances.