I want to go to my grandma's home.是这样说吗?不是：I want to go home.为什么要加“to”那?那么,I would like to get to my grandma's home on the bicycle.是这样说吗?

want to do 表示想要做什么
后面的go to表示到什么地方去
下面那句是对的

go 和 home之间如果没有其他词,就不要加to,因为home前一般不加介词,但有了grandma 这样的修饰词就要加to了

want to do 固定句型 一般不说get to somewhere，而说go to somewhere 一般说by bicycle表示方式，所以应该是I would like to go to my grandma's home by bicycle.

I want to go to my grandma's home.说法正确 want to do sth是固定用法，所以加to 应该说I would like to get to my grandma's home by bike.

I want to go to my grandma's home.这是对的
此时的“home”作为一个名词
但是当go home 连用 则作为副词
所以不加其他词
而“I would like to get to my grandma's home on the bicycle.”
应改为“I would like to go to my grandma's home on the bicycle.”或
“I would like to get my grandma's home on the bicycle.”
因为get为及物动词