It varies. There are different levels of privacy when it comes to geo - tagged photos. Some social media sites give you the option to make your entire profile public, in which case strangers can see all your geo - tagged photos. However, if you go into the privacy settings and limit it to a smaller group, such as only people who are mutual friends, then strangers will be excluded. Also, some platforms may have a 'nearby' feature where people in the vicinity can see your geo - tagged photos even if they're not your friends, but this can usually be turned off in the settings as well.
I'm not entirely sure specifically as there could be many different 'princess guard archon visual novels'. Generally, it might involve a story about a guard protecting a princess in a world with archon - related elements, perhaps with elements of fantasy, adventure and character relationships.
There are many interesting fanfictions about Geo from Megaman Star Force. Some might focus on his adventures beyond what's shown in the game, like his encounters with new types of EM viruses. Writers often explore his character development, showing how he grows from a regular school kid to a powerful hero.
One common theme could be loyalty. Since it involves a princess guard, loyalty to the princess would likely be a central theme. Protecting the princess from various threats, whether they are political, magical or physical.
There is 'Archon's Quest'. This light novel is full of adventures. The world - building in it is quite fascinating, making the readers feel as if they are in the story. It follows the journey of the main character in an archon - filled world.
One more thing to consider is that there may be some interference from other apps on your device. Some apps may conflict with Snapchat's functionality. Try closing all other background apps and then attempt to add to Geo Stories again. If this works, then you can try opening the other apps one by one to figure out which one was causing the interference. If none of these solutions work, it might be a more complex software issue within Snapchat that only the developers can fully address, so reaching out to their support is a good next step.