The phrase "are gathering with" is correct and usable in written English.
It can be used when describing a situation where people are coming together or meeting for a specific purpose or event.
Example: "The community members are gathering with local leaders to discuss the upcoming festival."
Alternatives: "are meeting with" or "are assembling with".
Today, Americans are gathering with their loved ones to give thanks for the many blessings in our lives.
Iran-backed Shia militias, known as Hashid Shaabi or Popular Mobilisation, are gathering with government troops at a base near the city and more reinforcements were arriving on Wednesday.
Angelenos are gathering with a common purpose to bring life to the banks of the neglected Los Angeles River, a 51-mile-long, sunbaked concrete ditch best known as the location for fiery car chases in action movies.
If you are gathering with friends, I recommend someone guiding everyone in a centering meditation.
Other people are gathering with their friends to laugh, eat and enjoy each other's company.
I am taking her out of school early here in Paris and we are gathering with friends from all over the world to watch the events.
From what I'm gathering, with the economic climate, a lot of families are staying in.
Sanders supporters will be gathering with banners and pots and pans ("to make some noise").
And then, suddenly, it was Wednesday morning, and I was gathering with friends for coffee because none of us wanted to be alone.
So they have been gathering — with fellow lawmakers or activists or lobbyists or others — to talk or to raise money or to get oriented about some of what they will face when they take office in January.
George will be gathering with other funders, campaigners and academics interested in online organizing for a private meeting sponsored by Deutsch Foundation later this month at the University of Maryland to discuss shared research and strategy questions about this maturing field.
