How to Send SOL

To send SOL, you will need to interact with the SystemProgram.
import {
  address,
  lamports,
  createTransaction,
  createSolanaClient,
  signTransactionMessageWithSigners,
  generateKeyPairSigner,
  airdropFactory
} from "gill";
// @ts-ignore
import { getTransferSolInstruction } from "gill/programs";

const { rpc, rpcSubscriptions, sendAndConfirmTransaction } = createSolanaClient(
  {
    urlOrMoniker: "http://127.0.0.1:8899"
  }
);

const signer = await generateKeyPairSigner();
await airdropFactory({ rpc, rpcSubscriptions })({
  commitment: "confirmed",
  lamports: lamports(5_000_000n),
  recipientAddress: signer.address
});

const destination = address("nick6zJc6HpW3kfBm4xS2dmbuVRyb5F3AnUvj5ymzR5");

const { value: latestBlockhash } = await rpc.getLatestBlockhash().send();

const tx = createTransaction({
  version: "legacy",
  feePayer: signer,
  instructions: [
    getTransferSolInstruction({
      source: signer,
      destination,
      amount: lamports(1_000_000n)
    })
  ],
  latestBlockhash
});

const signedTransaction = await signTransactionMessageWithSigners(tx);
await sendAndConfirmTransaction(signedTransaction);