In fanfiction, Gohan's Super Saiyan 2 form might have different power levels. For example, some fanfics might make him much stronger than in the canon, able to defeat enemies with a single blow that would give him a tough fight in the original story. Also, his appearance in the form could be more detailed or different, like his hair being a different shade of gold.
Often in fanfiction, Gohan's Super Saiyan 2 form can have new abilities. Maybe he can fly faster or has some sort of energy shield while in that form, which is not shown in the canon. His mental state in the form can also be different. In the original, he was often very focused, but in fanfiction, he could be more reckless or more in control depending on the story's plot. He might also use the form in situations where in the canon he wouldn't, like in everyday life just to show off or to solve minor problems.
Fanfiction sometimes takes Gohan's Super Saiyan 2 form in unique directions. His power growth in the form could be tied to different things compared to the canon. For instance, instead of just training hard, it could be related to his relationships or his study of ancient Saiyan lore. The form could also have a different impact on his body. In the canon, there are some limitations and drawbacks, but in fanfiction, these could be completely different. For example, instead of getting tired quickly, he could actually gain more energy the longer he stays in the form, which would completely change the way he fights and the strategies he uses.
Chapter 669, "My First Love Sister Who Died Young", is the clearest early answer because it turns Chen Qijun's situation into a concrete plot event. The chapter turns that into something concrete by moving from Bang," the door closed, but Chen Qijun's words lingered in Tai Fan's...
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A practical answer is Chapter 10, because it turns the idea into a concrete scene. The chapter opens with Qiao's shocked face struggle to recover, Lin Manru also tasted for the..., adds pressure through The young man stood motionless, his gaze fixed on the girl below, and..., and ends on Who was.
Chapter 468, "Joyously Receiving a Fainting Gift Pack", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Seeing a human, the wild boar became even more agitated, a massive...
Chapter 921, "I scored 200 more points than your brother!", is the clearest early answer because it turns Shen Lan's situation into a concrete plot event. It opens with [I told you, she's only cut out for second-tier universities at...
Chapter 778, "The Gift of Being a Director", is the clearest early answer because it turns Chen Taifan's situation into a concrete plot event. It opens with Shiguang, I really misjudged you, you're actually this kind of...
Chapter 713, "Uncle Will Owe You for Life", is the clearest early answer because it turns God Jiang's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Jiang Li raised her head and was startled by Zhao Lang's smiling eyes.
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Chapter 732, "Sister Xiao Wan, I Don't Understand", is the clearest early answer because it turns Sister Xiao Wan's situation into a concrete plot event. It opens with Bai Lu, eavesdropping in the corner, marveled at Jiang Cheng's...