You gather some item - for example, by killing monsters, mining, woodcutting, fishing - and sell it on the Grand Exchange.
3 gp
1m on runescape means 1 million gp (1,000,000)
Tin - 35 gp Copper - 70 gp Iron - 102 gp Coal - 174 gp Mithril -224 gp Adamantite - 1,039 gp Runite - 15,700 gp
No. The botting companies in runescape that claim they sell runescape gp, however, do if you buy from them.
You cannot, as this is against both the rules of funorb and runescape.
you can merch, but you will have to be very patient with your items!
around 100 gp
Try it.
"GP" refers to the game's currency -- "gold", "coins", "money", etc -- GP simply means either gold points or pennies.
The max money on runescape is 2.147 bill (2 billion 147 million gp).
356 gp
Around 2.3 Billion GP