Rangers teenager Ciaran Dickson is among the trialists hoping to make an impact at Gillingham.
The 19-year-old is looking for a new club after the Scottish giants said the young midfielder was free to leave.
Dickson - a highly rated prospect - is one of several young players who have been allowed to leave the Ibrox club despite signing a new deal in January tying him to the club until 2023. He was recently reported to have been of interest to Burnley.
He made his Rangers debut last season in the League Cup but was loaned out to Championship side Queen of the South. He played his second game on trial for the Gills at Leyton Orient on Saturday, having appeared in the midweek game against Millwall.
Dickson made more of an impact coming off the bench against Millwall than he did on Saturday, with boss Steve Evans admitting few did themselves any favours in a disjointed showing.
Evans is hoping to make a decision on his trialists by the end of next week. The new season starts when the Gills host Lincoln City on August 7.
Also featuring for the Gills on Saturday was former Crystal Palace goalkeeper Dion-Curtis Henry, making an appearance off the bench after coming in to assist following a midweek injury scare.
The 23-year-old, who moved to Palace in 2017 after starting out at Peterborough, was called upon after Gillingham’s summer recruit Jamie Cumming picked up an ankle injury on Thursday. That injury was soon brushed off but Evans was happy to give the keeper some minutes, replacing Aaron Chapman in the second half.
Former Oxford United forward Rob Hall, 27, and experienced winger Mustapha Carayol have also been involved during Gillingham’s last two matches.
Evans admits it’s tough for those trial players to make an impact, saying: “I don’t think anyone has done enough yet to say we want to bring them in but you have to give people an opportunity.
“We know they are good players, yes, but it is not about being good players, you have to earn it wherever you go, but we will continue to look. We will keep the boys until the back end of the week and we will make the decision.
“There is no doubt they have quality in their play but we have to look at them and decide whether they are going to be capable of starting football matches (for us) and we are still on the fence.
“It is good we had them because I purposely wanted to have a look at them away at Leyton Orient because (their manager) Kenny Jackett has a team who he expects to challenge, he is expected by his board to challenge for promotion. He had eight or nine of his starting team (for their first league match) out, I think in the first half we probably had maybe one.”
Defender Connor Ogilvie was an unused substitute for the Gills on Saturday. An offer remains on the table for the former Spurs man but he wasn't risked after suffering a groin injury against Millwall.